Hello RB users,
I have been using RB service for about 3 months now. Email and contact sync (via CardDAV) works just great. However, from day one, Calendar sync with macOS and iOS devices has not worked at all, using CalDAV.

Any hints and help to get this working will be greatly appreciated.

On macOS and iOS, the account can be added as CalDAV, however, no sync of calendar invites, either sent or received, works.

A couple of options are CalDAV-sync by dmfs. This stopped working for me and I couldnít get it to work again. Another is Calendar Sync - I donít see developer name on Play store but she has an email address at gmx.at and is very responsive. The interface is very different and itís pricey at £7.99 but seems robust. Thereís a trial version that lasts 2 weeks.